一种预测—校正式单点迭代方法 |
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引用本文: | 高坚.一种预测—校正式单点迭代方法[J].大学数学,1997(2). |
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作者姓名: | 高坚 |
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作者单位: | 烟台大学 |
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摘 要: | 本文以Newton迭代法(xn+1=xn-f(xn)/f′(xn),收敛阶为2)为基础,给出了一种新的实用的预测—校正式单点迭代方法(xn+1=xn-u(xn)f(xn)+12f(xn-u(xn))f(xn)-12f(xn-u(xn))收敛阶为4).该方法不仅公式简洁,计算方便,计算量小,而且收敛阶高,收敛速度快
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关 键 词: | 预测—校正,迭代法,收敛阶 |
A Kind of Prognosication-Revision Iterative Method |
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Abstract: | This paper is based on Newton Iterative Method(xn+1=xn-f(xn)/f′(xn), the order of convergence is two), and provides a new kind of practical iterative method (xn+1=xn-u(xn)(f(xn)+f(xn-u(xn))/2)/(f(xn)-f(xn-u(xn))/2), the order of convergence is four). This method has arranged form. It is not only easy to compute, but also a quick convergence method. |
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Keywords: | prognosication-revision iterative method order of convergence |
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